| Term | Full Form | Category |
|---|---|---|
| HSIS | Hazardous Substances Information System | Others |
| HSIS | Head Start Impact Study | Others |
| HSIS | Health Sciences Information Services | Others |
| HSIS | Health Supplements Information Service | Others |
| HSIS | Highway Safety Information Service | Others |
| HSIS | Highway Safety Information System | Others |
| HSIS | Highway Structures Information System | Others |
| HSIS | Hot Springs Intermediate School | Others |
| HSIS | Hybrid System Integration and Simulation | Others |